Improvement in machines for driving nails in boots and shoes



S.HARRI&

MACHINES FOR DRIVING NAIL'S IN BooTs AND s'IIoES.

Patented'J'unelS, 1876.

UNTTEE STATEs PATENT @TE-Eea.

SAMUEL HARRIS, OF BOSTON, MASSACHUSETTS, ASSIGNOB TO S. B. KNOWLTON, OFSAME PLAGE.

IMPROVEMENT IN MACHINES FOR DRIVING NAILS IN BOOTS AND SHOES.

Specification forming part of Letters Patent No. 175,768, dated 'June13, 1876 application filed April 15, 1876.

vmachine described in Patent No. 170,085, and

issued on November 1,6, 1875. In this machine it was found, in practice,that the'nails were liable to catch between the projections for pickingthem up and the bridge,- and thus clog the machine. In my presentimprovement this difficulty is obviated by a new method of deliveringthe nails from the hopper to the raceway, and from the raceway to thereceiving-plate, by which the operation of presenting the nails ofdifferent sizes to the action of the driver is more rapidly andefficiently performed, and without liability to clog.

My invention also consists of an interchangeable receivingplate, soconstructed and arranged as to form a continuation of the raceway toconduct the nails of a larger or smaller size, at the will of theoperator, to the point of entrance of the driver.

Further improvements .in detail are described hereinafter.

Referring to the drawings, Figure l represents a perspective view of amachine embodying my invention. Fig. 2 represents detail views of thereceiving.- plate and rotary die.

E E represent the main portion of the frame, supported upon a stand, AB. F is a bedplate resting upon the lower portionof the frame E. At therear part of. the frame are secured two hoppersvor receivers, G G', inwhich are arranged th'e rotating disks H H, provided with projections KK, having their faces of concave form, so as to act as scoops forcarrying the nails up from the hoppers to the raceway. At a point nearthe center of each hopper is arranged a chute, M, so as to readilyreceive. the nails which are carried up by the scoops K, and aredelivered upon the portion of the raceway I within the hopper. Fromtheraceway I the nails pass to the raceway P, which is composed of threewires, as shown in Patent N o. 170,085. The front ends of wire racewayconnect with openings or slots in a bar, 4, that extends across theinnerside of the front part of the frame. W represents a movable circularplate, having a slot extending from the circumference to the center, andforming a` continuation of the raceway, so as to conduct the nails tothe point to be operated upon by the driver. The outer end of the slotcommunicates with one or'the other of the openings or slots 4 in the bar4, as required for the passage of a larger or smaller nail from theraceways P. When the slot in plate W corresponds with one of theopenings in the bar 4, the other opening in said bar is closed, so that.only one set of nails can pass from the raceway to the receiving-plateWat a time. The receiving-plate is held in position for the slot tocorrespond with either raceway by means of a bar, which catches innotches in the rim a. The plate is also held so as to prevent its movingwhen the driver is acting on the nail by means of a pin, p, on the lowerend of a bar, t, that extends upward, and is attached at its upper endto a short bar, m, -pivoted toY the front part of a frame lo, as shown.The free end of the harm is operated by means of a pin on thesliding-block a, so as to raise the pin p from the holes in the plate Wat the proper time. The bar t', to which the detaining-pin p isattached, is held down by means of a spring, l, as shown. The slottedreceivingplate W rests upon the feeding-plate or rotating die g, inwhich is the curved feedingslot h, as shown in Fig. 2. The feeding-plateg is attached to the gear-wheel t by means of a collar or sleeve, u,which latter surrounds a stationary sleeve, c, secured to the extensionof the frame F. The sleeve o has a slot in one side corresponding withthe slotted guide a' that fits within the stationary sleeve c.Projecting downward below the fra-me F', and forming a part ofthestationary sleeve,"fv, is the guide e, which conducts the nail to thesole, where it is driven in. The guidez, which is stationary, forms acontinuation of the rotating guide x, which constitutes a part. of therotating die g. By this construction the nail is carried with certaintyand directuess to its position, to be acted on by the driver Withoutliability of the point ilying out. Motion is imparted to the rotary diefrom the gear-wheel V on the shaft U. y At each side of, and passy ingunderneath, the extension-guide z, are arranged the yielding holdersbib, which serve to receive the points of the nails, and are caused toseparate to allow the head of the nail to pass through when thedriverdescends to act upon it. Just at the rear of' the yield` ing holders b bis arranged afeed-Wheel, c, the shaft of which extends backward to arat-chet- Wheel, to which an intermittent motion is imparted by means ofa pawl on the rod e, which is operated by means of a cam on the mainshaft R. Under the lower projecting portion -ot the frame in front isarranged a guide, d,

which may be made to slide in bearings longitudinally, against which theedge of shoe-sole bears while the nails are being driven. The boot orshoe is supported upon the rest C, attached by a balland socket joint tothe weighted lever D. The np-and-down motion of the driver is effectedby means of the cam 0 on the shaft Rand the spring s.

What I claim as my invention, and desireto secure by Letters Patent, is

l. The elevated chuteMarranged within the hopper, as shown, the rotatingdisk H, provided With the lfters K, and the raceway I, all

constructed and arranged to operate substantially in the manner and forthe purpose set forth.

2. The interchangeable receiving racewayplate W, in combination with thenail-oonductors, substantially as and for the purpose described.

3. The combination ot' the receiving-plate W and the rotary die g,substantially as set plate W, ot' the detent-pin p, actuated by.

means of theup-and-down motion of the driverholder, as described.

8. The adjustable slotted raceWay-plate W, as and for the purpose setforth.

In testimony whereof I have signed my name to this speciioation in thepresence of two subscribing Witnesses.

SAMUEL HARRIS.` Witnesses: i

J. H. ADAMS, DAVID MURRAY.

